10. Copart ( CPRT)

Company profile: Copart, with a market value of $3 billion, provides auction services to sell salvaged vehicles, which are either damaged vehicles deemed a total loss for insurance purposes or recovered stolen vehicles for which an insurance settlement has already been paid.

Investor takeaway: Its shares are up 10% this year and have a three-year, average annual return of 21%. Analysts give its shares one "buy/hold," five "holds," and three "weak holds," according to a survey of analysts by S&P. Analysts expect it will earn $2.83 per share in 2012, and that that will grow to $3.17, or by 12% in 2013. It's the top holding of the Wasatch fund. Copart announced March 12 that its board of directors has approved a two-for-one split of its common stock. Additional shares issued as a result of the stock dividend will be distributed after the close of trading on March 28 to stockholders of record on March 23, it said.

9. Liz Claiborne ( LIZ)

Company profile: Liz Claiborne, with a market value of $1.2 billion, designs, sources, and markets apparel and accessories under a wide range of brands and sells its merchandise to high-end and mid-tier department stores and through its own stores.

Investor takeaway: Its shares are up 40% this year and have a three-year, average annual return of 83%. Analysts give its shares one "buy" ratings, one "buy/holds," four "holds," and one "weak hold," according to a survey of analysts by S&P. It's the top holding and one of the best performers for the Nicholas fund.

8. DealerTrack Holdings ( TRAK)

Company profile: DealerTrack, with a market value of $1.3 billion, is a software firm focused on the automotive retail industry. It uses the Internet to link auto dealers with banks, finance companies, credit unions, and other financing sources. It has over 20,000 auto dealers using its network.

Investor takeaway: Its shares are up 12.5% this year and have a three-year, average annual return of 34%. Analysts give its shares two "buy" ratings, one "buy/holds," five "holds," and one "weak hold," according to a survey of analysts by S&P. Those analysts expect it to earn $1.03 per share this year and grow by 20% to $1.24 in 2013. It should benefit from the growing pace of auto sales. It's the top holding in the Loomis Sales fund.

7. Life Time Fitness ( LTM)

Company profile: Life Time, with a market value of $2.1 billion, is an operator of upscale health clubs that is growing rapidly.

Investor takeaway: Its shares are up 9.5% this year and have a three-year, average annual return of 72%. Analysts give its shares three "buy" ratings, two "buy/holds," four "holds," and one "weak hold," according to a survey of analysts by S&P. Morningstar says that it is in an industry characterized by intense competition and thin profitability, but the company has "performed admirably" and set itself apart "by offering a high-quality member experience through large resort-like centers." This stock is a top five holding of both the Loomis Sales and Wasatch funds.

6. InnerWorkings ( INWK)

Company profile: InnerWorkings, with a market value of $547 million, provides print procurement solutions to corporate clients and working as an intermediary between thousands of print shops and client companies that need their services. It profits by using a database and a competitive bid process to match a client's print order with the appropriate service provider.

Investor takeaway: Its shares are up 26% this year, and have a three-year, average annual return of 49%. Analysts give its shares three "buy" ratings, one "buy/hold," and one "hold," according to a survey of analysts by S&P. It's a top performer for the Nicholas fund. It's expected to earn 45 cents per share this year, rising to 58 cents in 2013.

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